Interlocking mechanism



Oct 1933. J. F. OHMER ET AL INTERLOCKING MECHANISM Original Filed Aug. 28, 1925 2 Sheets-Sheet l I lNVbNTP/(S 9/ ATTORNbY Oct. 31, 1933. J, F, OHMER ET AL INTERLOCKING MECHANISM Original Filed Aug. 28, 1925 2 Sheets-Sheet 2 run: PM

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.m/ Wm. m y w vhf A TTORNEY Patented Get. 31, 1933 e ress orsrfi INTERLOCKING MECHANISM John F. Ohmer and Albert S; Wheelbarger, Dayton, Ohio, assignors to Ohmer Fare Register Company, Dayton, Ohio Original application August 28, 1925, Serial No.

53,082. Divided and this application 24, 1932. Serial No. 594,778

February 8 Claims. (01. 235-130) This application is a division of the Patent N 0. 1,853,741, issued April 12, 1932, and relates in particular to various interlocking mechanism shown in the said application. More particularly,

it relates to a resetting mechanism which is looked against operation while the direction indicating means is being changed. It also relates to means whereby the resetting mechanism is looked after it is reset. It is also provided with a full stroke mechanism and with means actuated by the full stroke mechanism whereby the resetting mechanism is unlocked as soon as the actuating means is operated after the passenger counter has been reset to zero. Other objects 1: will appear in the detailed specification and side of the machine.

Referring more particularlyto the drawings, the machine is mounted on a floor plate 1 provided with a suitable boss 2 which receives the lower end of a supporting column 3 on which rests the register. A suitable casing 5 is provided enclosing the machine. The machine is actuated from a treadle mounted in lugs 11, which treadle extends through a slot 12 in the supporting column 3 and actuates a bar 18 so that the bar is elevated when the tr adle is depressed and the foot is removed from the treadle the bar 18 is lowered by gravity. The bar 18 engages a plate 29 pivoted on a rod 39. The plate 29 provided with. a laterally extending lug 33 engages the lower beveled end of a rack bar '34, slidable between rollers 35, so that as the treadle is depressed the rack bar 34 will be elevated.

The rack bar 34 is provided with teethBZ which engage the teeth of a pinion 38 loosely mounted on the main drive shaft 39. Mechanism is shown in the said Patent 1,853,741 whereby the main drive shaft 39 is actuated through a pawl ar-- rangement when the rack bar 31 is being raised and this pawl will overrun when the rack bar:

is being depressed. This mechanism, however, formsno part of the invention of the divisional application and is, therefore, not shown or described. The main drive shaft 39 has secured thereto adisk41 integral with the ratchet 4. The full stroke ratchet wheel 4 isprovided with a cut-away portion 6 which receives a double-nosed full stroke pawl 7 pivotally mounted on a yieldable arm 51, which arm is normally urged downwardly by means of a spring 8. The arm 51 is pivoted on a fixed stud 9, the arrangement being such that when the ratchet wheel 4 has begun its movement in either direction the pawl '7 will so engage the teeth thereof as to prevent the return movement of the ratchet wheel until it has completed a full rotation and'the pawl has again entered the cut-away portion 6.

, The disk 41 is provided with a notch 42 which normally receives a finger depending from a' lever 44 fulcrumed at 45 to the side frame of the machine. The lever 44 is provided with a pin 46 serving as a fulcrum for a bell crank lever 4'7, which lever is normally pulled in a clockwise direction by means of a spring 48. The lever 47 carries a finger 49, which finger normally lies in the path of movement of a pin 50 carried by the rack bar 34. It is, therefore, apparent that each time the treadle is depressed the rack bar 34 is raised so that the pin 50 engages the finger 49 and raises the lever 44 against the tension of the spring 52, removing the finger 43 from the notch 42 so that the main drive shaft 39 can be rotated. The finger 49, after raising the lever 44, slides off the pin 50 and the finger 43 thereafter rides on the periphery of the disk 41. A suificient number of teeth are provided on the pinion 38 so that one complete rotation will be' imparted to the shaft 39 each time the treadle is depressed, While on the return movement of the rack bar 34 the shaft 39 is held against rotation hymeans of the lever 44 engaging the notch 42 and the disk 41 secured to the main drive shaft 39. On this reverse movement the pinion 38 is permitted to r0- tate by means of the overrunning pawl as shown in the said patent, and which forms no part of the invention of the divisional application. As soon as the treadle is released the spring 390 (Fig. 4) secured to the side wall 36 and to a lug 391 of the rack bar 34 pulls the rack bar down into its initial position. Of course, this movement is assisted by gravity.

The upper end of the rack bar 34 is provided with two spaced pins 58 and 59 (Fig. 3). As the pin 59 is raised with the rack bar 34 it engages an arm 60 mounted on a sleeve 61 (Fig. 1) which sleeve is rotatably mounted on the shaft 62. The sleeve 61 carries a crank arm 63 which actuates a pawl 64 which actuates a ratchet 65 secured to the units counter 66 on the counting mechanism showing the number of passengers carried on that trip. A suitable pawl 67 is provided to prevent retrograde movement as the finger 64 moves downwardly by means of the pin 58 engaging the arm 60 and lowering the finger 64 as the rack bar 34 moves on its downward stroke.

Any suitable transfer mechanism such as that shown in the said patent may be employed whereby the tens wheel and hundreds wheel 81 may be actuated from the units wheel 66. This transfer mechanism is nothing but the usual Geneva gearing, which forms no part of this invention, except that the star wheels 88 are at certain times disengaged from the transfer gears 89. A lever 83 is secured to a direction disk 82 mounted on the shaft 109. When the car, for instance, reaches the end of its journey the conductor will move the lever 83 from its upright position shown in Fig. 1 to a lower position, or vice versa, which will rotate the direction disk 62 which carries a triangular-shaped cam 84. Regardless of which direction the lever 83 may be moved, the cam 84 will engage the inner end of a lever 85 secured to a shaft 86, which lever carries a yoke 87 provided with star wheels 88.

the units counter 66 makes a complete rotadign, the star wheel in mesh with the gear 89 secured to the units counter will rotate the tens cpunte'r 80 one-tenth of a revolution as is well known in the art. When the lever 83 is shifted at the end of the run and the cam 84 engages the lever 85 it withdraws the star wheels 88 out of engagement with the said gears so that the units, tens and hundreds counters 66, 80 and 81 respectively may be reset to zero. This movement of the lever 85 rotates a lever 86a secured to the shaft86 moving its lug 94 over the surface of the lever 96 and away from the notched wheel 91 so that the finger 92 of the lever 86a is withdrawn from the notch 93 of the notched wheel 91, or in a clockwise direction as viewed in Fig. 4. The notched wheel 91 is now free to rotate with the shaft 115 to which it is secured and it may be rotated by the hand knob 114 in a clockwise direction as viewed in Fig. 4 to reset the passenger counters 66, 80 and 81 by any conventional means, which means forms no part 01 this invention and is not shown or described.

As soon as the lug 94 passes beyond the surface 95, the lever 96, fulcrumed at 97, is raised by its spring 97 so that the lug 94 drops into a notch of the lever 96. This notch holds the finger 92 on the lever 86a out of the notch 93 of the notched wheel 91.

When the operator rotates the hand knob 114 to reset the counters to zero the notched wheel 91 makes almost a complete revolution, at which time the lug 99 engages the beveled surface 13 of the lug 98 forming a part of the lever 96, depressing the said lever and releasing the lug 94 so that the spring 107' (Fig. 1) will be effective to rotate the arm 86a so that the lug 92 will be projected into the notch 93 when the notched disk 91 has completed its revolution. The lug 94, as the finger 92 passes into the notch 93, is removed from the cam surface 95 and thereby permits the spring 97' to pull the lever 96 upwardly so that the finger 98 will engage the ight hand side of the lug 99, as shown in Fig. 4, thereby locking the notched disk 91 against movement in either direction.

When the lever 86a is rotated clockwise by the cam 84 engaging the lever 85 the lower end 104 of the lever 86a engages a pin 105 carried by the lever 106 pivoted on a pin 107. The lower end of this lever is thereby moved to the left as viewed in Fig. 4 so as to overlie the upper end of the rack bar 34. It is, therefore, apparent that when the end of the run is reached and the direction lever 83 has been actuated by raising or lowering the same, the lever 106 looks the machine against operation until the conductor has reset the passenger counters.

In order to remove the lever 106 out of the path of movement of the rack bar 34 so that the machine could be operated it is necessary that the passenger counters 66, 80 and 81 should be reset, which as above mentioned is accomplished by rotating the thumb wheel 114 on the shaft 115. When the rotation of the resetting knob 114 and the notched disk 91 has been completed as above described the lower end 104 of the lever 86:: is withdrawn from the pin 105 and the spring 108 pulls the lever 106 to the right, as viewed in Fig. 4, and to the left as viewed in Fig. 1, thereby removing it from overlying the top of the rack bar 34.

The disk 82 is provided with teeth 110 which mesh with a pinion 111 which is fast on the shaft 78. A direction printing wheel 113 is also secured to the shaft 78 and on this printing wheel is suitable indicia, such as N for north and S for south, or other appropriate letters or figures. These printing type and the gear ratios are such that the movement of the lever 83 from its upper position to its lower position will bring one of the type into printing position and when the lever is moved. to its other position will bring the other type into printing position.

It will be noted in Fig. 1 that the disk 82 is provided with an arcuate cam 120 which, when the disk is being rotated to change the direction, engages the lever 121 loosely mounted on the shaft 62 and provided at its upper end with a projection 122 adapted to engage the teeth of the gear 89 attached to the passenger counter. It would he therefore, impossible to turn the thumb wheel 114 unless the direction lever 83 has been completely raised or lowered. When the direction lever 83 is in either its lower or its upper position the cam 120 has passed beyond the lever 121 so that the projection 122 is not wedged between the teeth of the gear.

Referring to 3 it will be noted that dogs 117 are secured to a shaft 123. A lever 127 is rotatably mounted on the side frame 36 by means of a stud pin 128, which lever engages one of the dogs 117 as shown in Fig. 3. The spring 52 normally tends to rotate this lever clockwise as shown in Fig. 1 and to hold its upper end against the dog 1.17. The lower end of the lever 127 projects downwardly against the upper portion of the full stroke arm 51. It it obvious that if the machine is partly operated by the rack bar 34 the arm 51 will be raised by the doublenosed pawl 7 being rocked to an oblique position by the teeth of the full stroke ratchet 4, which elevated position of the arm 51 will remove the upper end of the lever 127 away from the dog 117 and the spring 125 will pull the said pawl downwardly as viewed in Fig. 3 so asto release it from engagement with the pin 124 carried by one of the passenger counter wheels 66, 80, or 81. As a matter of fact, there are as many such dogs 11'! as there are counter wheels but for the purpose of illustration onlyone is shown or described.

When, however, the rack bar 34 has completed. its movement, the full stroke arm 51 will be lowered and the spring 52 will urge the upper end of the lever 127 into engagement with the dog 117, pushing the upper ends of the dog 117 into the path of movement of the pin 124. Normally, therefore, the lever 127, dog 117 or pin 124 present no interference with the actuation of the passenger counters by operating the rack bar 34. The lever 127 also carries an arm 392 which engages the pinion 111 holding it against rotation as long as the lever 127 is holding the dog 117.

The disk 82 is also provided with a cam 129 which engages a pin 130 on the lever 106 when the disk 82 is being rotated so that the lower end thereof will lie in the path of movement of the rack bar 34. A cam 129 serves as an effective means to move the lever 106 to a position such as to lock the rack bar 34 against movement but it must be remembered that after the gear 82 has been given its complete movement by the'lever 83, the cam 129 is no longer in engagement with the pin 130. It is at this time that it is necessary for the lower end 104 of the lever 86a to engage the pin 105, so as to hold the lever 106 in looking engagement with the rack bar 34 when the cam 129 has been moved beyond the pin 130. His, therefore, impossible to register passengers unless the direction indicating lever is completely up or completely down.

A cam 133 is secured to the shaft 115, which cam is provided with a cut-away portion ending in a bolt 134. A dog 135 is rigidly secured to the shaft 123 so as to move with the dogs 117 which are also rigidly secured to the said shaft. When the resetting knob 114 is rotated so as to rotate the passenger disks 66, 80, and 81 in a clockwise direction as viewed in Fig. 3, the pin 124 will pass beyond the dog 117 and immediately thereafter the cam 133 will engage the dog 135 rotating it and the dog 117 anti-clockwise against the tension of the spring 125. This places the upper end of the dog 117 in the path of movement of i he pin 124 so that when the passenger counting disks have completed their rotation they are stopped by the pin 124 engaging its dog 117, which is simultaneously with the time that the bolt 1.34 passes beyond the dog 135. The dog 135 and finger 92 now hold the shaft 115 against movement in any direction. The conductor, therefore, cannot reset the counters beyond the zero point nor can he reset the counters twice in succession. He could, of course, rotate the lever 83 as he will do at the end of the run to release the locking mechanism shown in Fig. 4 and thereafter he can reset the counters but not until then. Furthermore, it is necessary for him to completely reset the counters before he can operate the machine as heretofore described.

While this application discloses the preferred embodiment of this invention, we do not wish to be limited to the specific details shown and described herein, as it will be readily understood that these may be changed or varied wiihin the scope of the claims.

Having described our invention, we claim:

1. In a machine of the class described, an actuating means, a full stroke mechanism therefor, a passenger counter resetting mechanism, a direction disk,-means whereby said disk may be rotated, means whereby said resetting mechanism is locked while the disk is being rotated and is then unlocked, means whereby said resetting mechanism is again looked as soon as it is reset, and means actuated by said full stroke mechanism whereby said resetting mechanism is again unlooked as soona s the actuating means is operated after the passenger counter has been reset to zero.

2. In a machine of the class described, an actuating means, a full stroke mechanism therefor, a passenger counter resetting mechanism, a direction disk, whereby said disk may be rotated, means whereby said resetting mechanism is locked while the disk is being rotated and is then unlocked, a direction printer, a gear operativeiy connecting said printer and disk, means whereby said gear and resetting mechanism is again locked as soon as it is reset, and means actuated by said full stroke mechanism whereby said resetting mechanism is again unlocked as soon as the actuating means is operated after the resetting mechanism has been reset to zero.

3. In a machine of the class described, passenger counter drums, rotatable means operatively connecting said drums, a disk, means whereby said disk may be actuated, and means to render said rotatable means inoperative except when the disk is in either of two definite positions.

4. In a machine of the class described, passenger counter drums, rotatable means operatively connecting said drums, a disk, means whereby said disk may be actuated, and means whereby said rotatable means is disconnected from said drums except when the disk is in either of two definite positions.

5. In a machine of the class described, passenger counter drums, a star wheel operatively connecting said drums, a lever on which said star wheel is carried, a disk, means whereby said disk may be rotated, a cam carried by said disk and adapted to actuate lever and disconnect said star wheel from said drums when the disk is being rotated, and means whereby said drums are locked against rotation until after said disk has been completely actuated.

6. In a machine of the class described, a passenger counter, a resetting shaft therefor, a disk thereon provided with a notch, lug on said disk, a lever, a lug on said lever, means tending to urge said last-named lug toward said disk and intosaid-notch to lock said resetting shaft against rotation, a second lever adapted to engage s id lug on said disk and lock said disk against rotation in one direction, means whereby each of said levers may be disengaged from said disk, and means whereby said levers are caused to reengage and lock said disk after it has been ro-' means 1;.

the end of said third mentioned lever and disengaging the lugs on said first and third mentioned levers prior to the completion of the resetting of said resetting means so that the projection on the first mentioned lever can enter the notch on said disk and lock the resetting means.

JOHN F. OHMER. ALBERT S. WHEELBARGER. 

